Saint Martin has a tropical climate, typical of the northeastern Caribbean, with warm temperatures year-round, two main seasons, and distinct rainy and dry periods. Here’s a breakdown:
Climate Overview
Feature Details
Climate Type Tropical savanna (Köppen Aw)
Average Temps 24°C to 32°C (75°F to 89°F) throughout the year
Seasons Dry season (Dec–Apr) & wet/hurricane season (May–Nov)
Humidity High year-round (~75–85%)
Rainfall ~1,000–1,300 mm/year (39–51 inches), mostly during hurricane season
Sea Temperature ~26°C to 29°C (79°F to 84°F) — ideal for swimming year-round
Trade Winds Northeast trade winds keep the climate breezy and reduce heat effects
Seasonal Breakdown
Dry Season: December to April
Often called the “cool season”, though still warm and sunny.
Lower humidity, clearer skies, and ideal for tourism.
Avg. daytime temps: 27–29°C (81–84°F)
Rainfall is low; showers are brief.
Wet/Hurricane Season: May to November
Also the low tourist season due to potential storms and hotter, humid conditions.
Afternoon thunderstorms are more common, especially from August to October.
Avg. daytime temps: 30–32°C (86–89°F)
Hurricane risk peaks between August and October.
Notable past hurricanes:
Hurricane Irma (Sept 2017) caused major damage to both sides of the island.
Recovery efforts since have rebuilt infrastructure including airports, schools, and hotels.
Monthly Averages (Philipsburg Example)
Month Temp °C (High/Low) Rainfall (mm) Notes
January 28 / 23 60 Dry, sunny, breezy
April 29 / 24 80 End of dry season
June 30 / 26 90 Hot & more humid
September 31 / 26 130 Peak hurricane month
November 29 / 25 100 Wet season tapering off
December 28 / 24 80 Start of dry season
